/* ===== CSS Variables ===== */
:root {
    --color-primary: #1a6b3c;
    --color-primary-light: #2a9d5c;
    --color-primary-dark: #0f4a28;
    --color-accent: #f0a030;
    --color-bg: #ffffff;
    --color-bg-alt: #f7f9fb;
    --color-text: #1a1a2e;
    --color-text-secondary: #5a6275;
    --color-border: #e8ecf1;
    --radius: 12px;
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 20px rgba(0,0,0,0.08);
    --shadow-lg: 0 8px 40px rgba(0,0,0,0.10);
    --transition: 0.3s ease;
}

/* ===== Reset ===== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.7;
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
}

ul { list-style: none; }

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ===== Navbar ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255,255,255,0.92);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
    transition: var(--transition);
}

.nav-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 60px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 20px;
    font-weight: 700;
    color: var(--color-primary);
}

.logo-icon {
    font-size: 24px;
}

.nav-links {
    display: flex;
    gap: 32px;
}

.nav-links a {
    font-size: 15px;
    color: var(--color-text-secondary);
    transition: color var(--transition);
    position: relative;
}

.nav-links a:hover {
    color: var(--color-primary);
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-primary);
    transition: width var(--transition);
}

.nav-links a:hover::after {
    width: 100%;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.nav-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--color-text);
    border-radius: 2px;
    transition: var(--transition);
}

/* ===== Hero ===== */
.hero {
    padding-top: 100px;
    min-height: 90vh;
    display: flex;
    align-items: center;
    background: linear-gradient(160deg, #f0faf4 0%, #ffffff 40%, #fef9f0 100%);
}

.hero-content {
    display: flex;
    align-items: center;
    gap: 60px;
}

.hero-text {
    flex: 1;
}

.hero-text h1 {
    font-size: 44px;
    font-weight: 800;
    line-height: 1.2;
    color: var(--color-text);
    margin-bottom: 20px;
}

.hero-sub {
    font-size: 17px;
    color: var(--color-text-secondary);
    line-height: 1.8;
    margin-bottom: 36px;
}

.hero-actions {
    display: flex;
    gap: 16px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 32px;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    transition: all var(--transition);
    cursor: pointer;
    border: 2px solid transparent;
}

.btn-primary {
    background: var(--color-primary);
    color: #fff;
    border-color: var(--color-primary);
}

.btn-primary:hover {
    background: var(--color-primary-dark);
    border-color: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(26,107,60,0.3);
}

.btn-outline {
    background: transparent;
    color: var(--color-primary);
    border-color: var(--color-primary);
}

.btn-outline:hover {
    background: var(--color-primary);
    color: #fff;
    transform: translateY(-2px);
}

/* Phone Mockup */
.hero-visual {
    flex: 0 0 300px;
}

.phone-mockup {
    width: 280px;
    height: 520px;
    background: #1a1a2e;
    border-radius: 36px;
    padding: 12px;
    box-shadow: var(--shadow-lg), 0 20px 60px rgba(26,107,60,0.15);
    margin: 0 auto;
}

.phone-screen {
    width: 100%;
    height: 100%;
    background: #fff;
    border-radius: 26px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.mock-header {
    background: var(--color-primary);
    color: #fff;
    text-align: center;
    padding: 12px;
    font-size: 16px;
    font-weight: 600;
}

.mock-body {
    flex: 1;
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 14px;
    overflow: hidden;
}

.mock-action-card {
    background: var(--color-bg-alt);
    border-radius: 10px;
    padding: 14px;
}

.mock-action-name {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--color-text);
}

.mock-score-row {
    display: flex;
    align-items: center;
    gap: 14px;
}

.mock-score-circle {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    font-weight: 800;
    color: #fff;
    flex-shrink: 0;
}

.mock-score-circle.good {
    background: var(--color-primary);
}

.mock-score-circle.mid {
    background: var(--color-accent);
}

.mock-score-bars {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.mock-bar {
    height: 16px;
    background: rgba(26,107,60,0.15);
    border-radius: 8px;
    position: relative;
    overflow: hidden;
}

.mock-bar span {
    position: absolute;
    right: 6px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 10px;
    font-weight: 600;
    color: var(--color-primary-dark);
}

.mock-bar::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    width: inherit;
    background: linear-gradient(90deg, var(--color-primary-light), var(--color-primary));
    border-radius: 8px;
}

/* ===== Section Common ===== */
section {
    padding: 80px 0;
}

.section-title {
    text-align: center;
    font-size: 32px;
    font-weight: 800;
    margin-bottom: 12px;
    color: var(--color-text);
}

.section-sub {
    text-align: center;
    font-size: 16px;
    color: var(--color-text-secondary);
    margin-bottom: 48px;
}

/* ===== Features ===== */
.features {
    background: var(--color-bg-alt);
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.feature-card {
    background: #fff;
    border-radius: var(--radius);
    padding: 32px 28px;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition);
    border: 1px solid var(--color-border);
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: var(--color-primary-light);
}

.feature-icon {
    font-size: 36px;
    margin-bottom: 16px;
}

.feature-card h3 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--color-text);
}

.feature-card p {
    font-size: 14px;
    color: var(--color-text-secondary);
    line-height: 1.7;
}

.feature-badge {
    display: inline-block;
    background: var(--color-primary);
    color: #fff;
    font-size: 11px;
    font-weight: 700;
    padding: 3px 10px;
    border-radius: 10px;
    margin-bottom: 12px;
    letter-spacing: 0.5px;
}

.feature-card.featured {
    border-color: var(--color-primary-light);
    box-shadow: var(--shadow-md);
}

.feature-highlights {
    margin-top: 14px;
    padding-top: 14px;
    border-top: 1px solid var(--color-border);
}

.feature-highlights li {
    position: relative;
    padding-left: 20px;
    font-size: 13px;
    color: var(--color-text-secondary);
    line-height: 1.8;
}

.feature-highlights li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-primary);
    font-weight: 700;
    font-size: 13px;
}

/* ===== How It Works ===== */
.steps {
    display: flex;
    flex-direction: column;
    gap: 32px;
    max-width: 680px;
    margin: 0 auto;
}

.step {
    display: flex;
    align-items: flex-start;
    gap: 24px;
    background: var(--color-bg-alt);
    border-radius: var(--radius);
    padding: 28px 32px;
    border: 1px solid var(--color-border);
}

.step-number {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    background: var(--color-primary);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    font-weight: 800;
}

.step-content h3 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 6px;
}

.step-content p {
    font-size: 14px;
    color: var(--color-text-secondary);
    line-height: 1.7;
}

/* ===== Actions ===== */
.actions {
    background: var(--color-bg-alt);
}

.action-categories {
    display: flex;
    flex-direction: column;
    gap: 28px;
}

.action-cat {
    background: #fff;
    border-radius: var(--radius);
    padding: 28px 32px;
    border: 1px solid var(--color-border);
}

.action-cat h3 {
    font-size: 17px;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--color-primary);
}

.cat-count {
    font-size: 13px;
    font-weight: 500;
    color: var(--color-text-secondary);
    background: var(--color-bg-alt);
    padding: 2px 10px;
    border-radius: 10px;
    margin-left: 8px;
}

.action-cat.coming h3 {
    color: var(--color-text-secondary);
}

.action-cat.coming {
    opacity: 0.85;
}

.cat-desc {
    font-size: 13px;
    color: var(--color-text-secondary);
    margin-bottom: 14px;
    line-height: 1.6;
}

.action-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.tag {
    display: inline-block;
    padding: 6px 16px;
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    border-radius: 20px;
    font-size: 14px;
    color: var(--color-text);
    transition: all var(--transition);
}

.tag:hover {
    background: var(--color-primary);
    color: #fff;
    border-color: var(--color-primary);
}

.coming-tag {
    background: #f5f5f5;
    border-color: #e0e0e0;
    color: #999;
    cursor: default;
}

.coming-tag:hover {
    background: #f5f5f5;
    color: #999;
    border-color: #e0e0e0;
}

/* ===== Value Props ===== */
.value-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.value-item {
    text-align: center;
    padding: 36px 24px;
}

.value-icon {
    font-size: 40px;
    margin-bottom: 16px;
}

.value-item h3 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 10px;
}

.value-item p {
    font-size: 14px;
    color: var(--color-text-secondary);
    line-height: 1.7;
}

/* ===== About ===== */
.about {
    background: var(--color-bg-alt);
}

.about-content {
    display: flex;
    gap: 48px;
    align-items: flex-start;
}

.about-text {
    flex: 1;
}

.about-text p {
    font-size: 15px;
    color: var(--color-text-secondary);
    margin-bottom: 16px;
    line-height: 1.8;
}

.about-info {
    flex: 0 0 300px;
    background: #fff;
    border-radius: var(--radius);
    padding: 28px;
    border: 1px solid var(--color-border);
}

.info-item {
    display: flex;
    justify-content: space-between;
    padding: 12px 0;
    border-bottom: 1px solid var(--color-border);
}

.info-item:last-child {
    border-bottom: none;
}

.info-label {
    font-size: 14px;
    color: var(--color-text-secondary);
}

.info-value {
    font-size: 14px;
    font-weight: 600;
    color: var(--color-text);
}

/* ===== Footer ===== */
.footer {
    background: #1a1a2e;
    color: rgba(255,255,255,0.7);
    padding: 40px 0 24px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 18px;
    font-weight: 700;
    color: #fff;
}

.footer-links {
    display: flex;
    gap: 24px;
}

.footer-links a {
    font-size: 14px;
    color: rgba(255,255,255,0.6);
    transition: color var(--transition);
}

.footer-links a:hover {
    color: #fff;
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255,255,255,0.1);
    font-size: 13px;
}

.icp-placeholder {
    margin-top: 4px;
    color: rgba(255,255,255,0.4);
}

/* ===== Responsive ===== */
@media (max-width: 900px) {
    .hero-content {
        flex-direction: column;
        text-align: center;
    }

    .hero-text h1 {
        font-size: 32px;
    }

    .hero-visual {
        flex: none;
    }

    .hero-actions {
        justify-content: center;
    }

    .feature-grid,
    .value-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .about-content {
        flex-direction: column;
    }

    .about-info {
        flex: none;
        width: 100%;
    }
}

@media (max-width: 600px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 60px;
        left: 0;
        right: 0;
        background: #fff;
        flex-direction: column;
        padding: 16px 24px;
        gap: 16px;
        border-bottom: 1px solid var(--color-border);
        box-shadow: var(--shadow-md);
    }

    .nav-links.active {
        display: flex;
    }

    .nav-toggle {
        display: flex;
    }

    .hero {
        min-height: auto;
        padding-top: 80px;
        padding-bottom: 40px;
    }

    .hero-text h1 {
        font-size: 28px;
    }

    .phone-mockup {
        width: 240px;
        height: 440px;
    }

    section {
        padding: 56px 0;
    }

    .section-title {
        font-size: 24px;
    }

    .feature-grid,
    .value-grid {
        grid-template-columns: 1fr;
    }

    .step {
        flex-direction: column;
        gap: 12px;
    }

    .footer-content {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }

    .footer-links {
        flex-wrap: wrap;
        justify-content: center;
    }
}